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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Standardisation of parts for front and rear brake drums made in Chromidium.

Identifier  ExFiles\Box 171\2\  img348
Date  14th October 1937
  
RR 755 (toH) 46071 18-8-37 WHK 27059
COMPLETED 16.11.37.
PHANTOM III STANDARDISATION of PARTS.
Date 14.10.37.
X No. 1028.
Drawing No. S5623/4
Part List
Description of Parts: FRONT AND REAR BRAKE DRUMS MADE IN CHROMIDIUM.
Origin: To enable us to use Ferodo M.L. M.L. has not been tested with present drums.
Report of Experimental Test: The original reason for preferring to use "Chromidium" was that it is 7/- per cwt. cheaper than "Millenite". "Chromidium" drums ran 16,000 miles on 32-EX against M.L. and were satisfactory; also fitted to 33-EX. The "Chromidium" tested was brought out but it is proposed to cast in future in our own foundry.

COST TABLE
MATERIAL £ s. d.{John DeLooze - Company Secretary}
LABOUR £ s. d.{John DeLooze - Company Secretary}
CHARGES £ s. d.{John DeLooze - Company Secretary}
TOTAL £ s. d.{John DeLooze - Company Secretary}
Cost of Old Part: 5 11 0, 1 2 2, 1 18 9, 8 11 11
Cost of New Part: 1 8 3, 1 15 3, 3 7 6, 6 11 0
Nett Decrease: 2 0 11

Signature from Cost Dept. that above is correct. Q/Rb.{R. Bowen} 13.10.37.

APPROVALS
INITIAL, DATE, REMARKS
SG.{Arthur F. Sidgreaves - MD}, 16.11.37., Agreed Sg.{Arthur F. Sidgreaves - MD}
HS.{Lord Ernest Hives - Chair}, 16.11.37., Agreed Hs.{Lord Ernest Hives - Chair}
C., 15.10.37., Agreed C,
BY.{R.W. Bailey - Chief Engineer}, 16.11.37., Agreed By.{R.W. Bailey - Chief Engineer}
DA.{Bernard Day - Chassis Design}, 16.11.37., Agreed Da.{Bernard Day - Chassis Design}
RHC.{R. H. Coverley - Production Engineer}, 16.11.37., Agreed RHC.{R. H. Coverley - Production Engineer}
MX.{John H Maddocks - Chief Proving Officer}, 16.11.37., Agreed Mx.{John H Maddocks - Chief Proving Officer}
RM.{William Robotham - Chief Engineer}, 14.10.37., Agreed Rm.{William Robotham - Chief Engineer}
  
  


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